JP2906129B2 - Carton transfer conveyor spacing adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carton transfer conveyor for holding and transporting a carton opened in a cylindrical shape from both left and right sides by a pair of holding members. The present invention relates to an interval adjusting device for changing the distance in accordance with the distance.

[0002]

2. Description of the Related Art As a device for transporting a carton opened in a cylindrical shape while holding it from both left and right sides by a pair of holding members,
For example, there is a horizontal boxer disclosed in Japanese Patent Application Laid-Open No. 3-29705. This small box packing machine is composed of two parallelly arranged chains that constitute a carton conveyor.
(Holding member) is attached, and the carton is configured to be held from both sides by a pair of opposing partition plates. By driving the two chains in the same direction, the cartons held by the pair of partition plates are transported to the downstream side.

In the small box packing machine, there is provided a device for adjusting a distance between a pair of partition plates in response to a change in the size of a carton. That is, one chain constituting the carton conveyor is wound around the adjustment side gear system, and the other chain is wound around the fixed side gear system, and the adjustment side gear system runs independently of the fixed side gear system. It is configured to be able to be driven. Also, an operating gear mechanism is provided in the drive system of the adjustment gear system, and the drive from the main shaft connected to the drive motor is transmitted only from the operation gear mechanism to the adjustment gear system via the plurality of chain transmission systems. It has become. As a result, the partition plate provided on the chain of the adjustment-side gear system moves close to and away from the partition plate provided on the chain of the fixed-side gear system and stopped, thereby forming a pair of partition plates. Is adjusted.

[0004]

In the above-described prior art distance adjusting device, the position of the partition plate whose distance has been adjusted is
It is pointed out that the carton cannot be securely held from both sides by a pair of partition plates because the chain is not fixed at a predetermined position due to mechanical play of the chain transmission system or play due to the extension of the chain. In addition, as a result of not being able to hold the carton satisfactorily, there arises a problem that accurate positioning cannot be performed when the conveyance of the carton is stopped.

[0005] In the adjustment of the spacing of the partition plates in the operating gear mechanism, the position of one partition plate is fixed and the position of the other partition plate is relatively moved. There is also a drawback that a conveyor set based on the center position of the interval between the pair of partition plates cannot be used.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems inherent in the prior art, and has been proposed in order to suitably solve the problem. A drive system in a carton transfer conveyor is provided with less play. It is an object of the present invention to provide an adjustment device that accurately adjusts the distance between the carton holding members and adjusts the distance between the carton holding members based on the center position of the distance between the pair of holding members.

[0007]

[Means for solving the problems] To overcome the above-mentioned problems,
In order to achieve an intended object, the present invention provides a first endless cable body provided with a first holding member and a second endless cable body provided with a second holding member in parallel. By driving the body, the carton transfer conveyor configured to convey the carton opened in a cylindrical shape by the first holding member and the second holding member from both sides while holding the carton from the both sides. A first rotating body and a first drive gear that are wound around and drive the first drive gear and are integrally rotatably mounted on the drive shaft so as to rotate integrally therewith, and are supported rotatably. A second rotating body (34) around which the second endless cable is wound and driven, and a hollow shaft provided so that a second driving gear rotates integrally therewith; and a second shaft parallel to the driving shaft. One support shaft is rotatably provided, and a pair of planetary gears integrally rotate with the first support shaft. A first holder disposed so as to be swingable about a shaft of the drive shaft with one of the planetary gears meshed with the first drive gear; A second support shaft is provided rotatably in parallel with the second drive gear, and a pair of planetary gears is disposed on the second support shaft so as to rotate integrally therewith, and one of the planetary gears meshes with the second drive gear. A second holder arranged so as to be swingable about the axis with respect to the drive shaft, and the other planetary gear arranged on the first support shaft and the other planet arranged on the second support shaft. A drive mechanism that rotationally drives a third drive gear with which the gears are commonly meshed, and a drive mechanism that is linked to the first holder and the second holder, and swings both holders by the same amount in opposite directions about the axis of the drive shaft. And an adjusting mechanism that moves By rotating the third driving gear, the first rotating body and the second rotating body are synchronized in the same direction via the planetary gear of the first holder, the first driving gear, the planetary gear of the second holder, and the second driving gear. Rotating the first endless cord and the second endless cord in the same direction while maintaining a constant distance between the first holding member and the second holding member, and driving the two holders by the adjusting mechanism. The first holding member and the second holding member are brought closer to each other by changing the phase of each planetary gear with respect to each drive gear by swinging the same amount in the opposite direction about the axis of the first gear. The first endless cable and the second endless cable are configured to run in opposite directions to move away from each other.

[0008]

The third drive gear is driven in a state where the carton is held between a pair of the first holding member and the second holding member which are disposed on a pair of endless cords arranged parallel to the transport direction. When rotated by the mechanism, the pair of endless cords run synchronously in the same direction, and both holding members move while maintaining a constant interval. The first holding member and the second
When adjusting the gap with the holding member, the first drive gear and the second holder with the planetary gear are fixed with the third drive gear fixed.
By swinging the holder by the same amount in the opposite direction about the axis of the drive shaft, the first endless cable and the second endless cable travel in opposite directions. Thereby, the first holding member and the second holding member disposed on each endless cord move toward and away from each other with reference to the center of the interval, and
The interval is adjusted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the apparatus for adjusting the distance of a carton transfer conveyor according to the present invention will be described below.

FIG. 1 is a plan view showing a schematic configuration of a carton transfer conveyor according to an embodiment, and FIG. 2 is a longitudinal sectional view of a main part of the conveyor. As shown in FIG. 2, the carton transfer conveyor 10 has a pair of plates 14 and 16 vertically spaced apart from each other by a predetermined distance above a horizontal conveyor frame 12 in a conveying direction of a carton 18 opened in a cylindrical shape. It is arranged to extend by. A driven shaft 20 is vertically disposed via a position adjusting mechanism (not shown) on the upstream side of the plates 14 and 16 in the carton conveyance direction. The driven shaft 20 is provided between the plates 14 and 16. A first driven sprocket 22 and a second driven sprocket 24 are vertically rotatably supported at positions facing each other so as to be rotatable. The driven shaft 20 is configured to be movable and adjusted in the carton conveying direction with respect to the plates 14 and 16 by a position adjusting mechanism, so that tension of endless chains 36 and 38 described later can be adjusted.

As shown in FIG. 4, a hollow housing 26 is erected vertically on the conveyor frame 12 downstream of the positions where the plates 14, 16 are disposed.
A hollow shaft 28 is coaxially inserted through 6 and is rotatably supported. A driving shaft 30 is rotatably supported by being coaxially inserted into the hollow shaft 28, and a first driving sprocket as a first rotating body is provided at an upper end of the driving shaft 30 projecting upward from the hollow shaft 28. 32 are arranged to rotate integrally. Further, a second drive sprocket 34 as a second rotating body is disposed at an upper end of the hollow shaft 28 projecting upward from the hollow housing 26 so as to rotate integrally. The first driving sprocket 32 and the second driving sprocket 34 are vertically separated from each other between the plates 14 and 16 (see FIG. 2). A first endless chain 36 as a first endless cable is wound between the upper first driving sprocket 32 and the first driven sprocket 22 that form a pair, and the lower second driving sprocket 34 that forms a pair. A second endless chain 38 as a second endless cord is wound between the second driven sprocket 24 and the second driven sprocket 24.

The first endless chain 36 has a plurality of plate-like first holding members 40 separated by a predetermined distance in the running direction.
Are disposed via a holder 42, and the first holding member 40
Extend for a predetermined length toward the outside intersecting the transport direction. Similarly, a plurality of plate-like second holding members 44 are provided on the second endless chain 38 at predetermined intervals in the running direction.
Is disposed via a holder 46, and the second holding member 44
Extends for a predetermined length toward the outside that intersects the transport direction in a relationship parallel to the first holding member 40. As shown in FIG. 1, the first holding member 40 and the second holding member 44 are set so as to be alternately located in the carton transport direction, and the first holding member 40 and the second The holding member 44 is configured to hold the carton 18 opened in a cylindrical shape from both left and right sides.

As shown in FIG. 3, the holder 42 of the first holding member 40 is formed in a U-shape, and the upper and lower endless chains 36, 38 face the inside thereof.
And the first endless chain 36 are connected via an L-shaped bracket 47. Horizontal guide rollers 48, 48 are rotatably supported by upper and lower horizontal portions of the holder 42, and a vertical guide roller 49 is rotatably supported by a lower portion of the vertical portion. The holder 46 of the second holding member 44
Similarly, two horizontal guide rollers 48, 48 and 1
The two vertical guide rollers 49 are rotatably supported, respectively, and the holder 46 and the second endless chain 38 are connected via an L-shaped bracket 50. The plates 14, 16
As shown in FIG. 2, endless chains 36, 38
A pair of guide rails 51, 51 are respectively disposed at positions corresponding to the outward path and the return path in parallel to the carton transport direction, and the horizontal guide rollers 48, 48 move between the two guide rails 51, 51. Is done. Holder 4
The 2,46 vertical guide rollers 49,49 are configured to roll on the upper surface of the lower guide rail 51 so that the two holding members 40,44 move stably.

As shown in FIGS. 4 and 5, a first drive gear 52 is provided on the drive shaft 30 extending below the conveyor frame 12 so as to be integrally rotatable. A second drive gear 53 is provided at a position extending downward from the second drive gear so as to be integrally rotatable. Drive shaft 30
A first holder 54 having a pair of first arms 54a, 54a vertically spaced apart from each other by a predetermined distance below a portion where the first drive gear 52 is disposed is provided with the first arms 54a, 54a.
It is pivotally supported via a. A first support shaft 55 parallel to the drive shaft 30 is pivotally supported by the first holder 54 in a vertically rotatable manner. The upper end of the support shaft 55 extending upward from the first holder 54 has A first upper planetary gear 56 meshing with the first drive gear 52 is provided so as to be integrally rotatable. At the lower end of the first support shaft 55 extending downward from the first holder 54, a first lower planetary gear 57 that meshes with a third drive gear 64 described later is provided so as to be integrally rotatable.

The first drive gear 52 of the drive shaft 30
A second holder 5 having a pair of second arms 58a, 58a vertically spaced apart from each other below a portion where
8 is pivotally supported via its second arms 58a, 58a. The second holder 58 includes the drive shaft 3
A second support shaft 59 parallel to 0 is pivotally supported vertically and freely rotatable. An upper end of the support shaft 59 extending upward from the second holder 58 is engaged with a second drive gear 53. An upper planetary gear 60 is disposed so as to be integrally rotatable. Further, a second lower planetary gear 61 meshing with a third drive gear 64 described later is provided at a lower end of the second support shaft 59 extending downward from the second holder 58.
Are arranged so as to be integrally rotatable. The first arm 54a of the first holder 54 and the second arm 58a of the second holder 58
Are arranged in a positional relationship that does not interfere with each other.

An indexing device 63 that can be indexed by a drive motor 62 is disposed below the conveyor frame 12 at a position directly below the drive shaft 30. As shown in FIG. 4, the first lower planetary gear 57 and the second lower planetary gear 61 are commonly meshed with the third drive gear 64. That is, when the third drive gear 64 is rotationally indexed by the indexing device 63, the first support shaft 5 is rotated via the first lower planetary gear 57 meshing with the third drive gear 64.
5 rotates, and this rotation is transmitted via the first upper planetary gear 56 → the first drive gear 52 → the drive shaft 30 to the first drive sprocket 3.
2 is transmitted. Further, the second support shaft 59 rotates via the second lower planetary gear 61 meshing with the third drive gear 64, and this rotation is performed via the second upper planetary gear 60 → the second drive gear 53 → the hollow shaft 28. The power is transmitted to the second drive sprocket 34. The gear ratio of the first drive gear 52 to the second drive gear 53 is set to be the same, and the first upper planetary gear 56 and the second upper planetary gear 60, and the first lower planetary gear 57 and the second lower planetary gear The gears 61 have the same gear ratio. Therefore, when the third drive gear 64 is indexed for rotation, the first drive sprocket 32 and the second drive sprocket 34 rotate by the same angle, and the first endless chain 36 and the second endless chain 38 are synchronized in the same direction. Then, the pair of the first holding member 40 and the second holding member 44 move in parallel while keeping the separation distance constant. A drive mechanism is constituted by the drive motor 62 and the indexing device 63.

The first upper planetary gear 56 includes two gears 5.
6a and 56b are overlapped, and one gear 56a
And the other gear 56b can be moved and adjusted in the circumferential direction. By moving the two gears 56a and 56b relative to each other, the first upper planetary gear 56 and the first drive gear 52 can be engaged with each other with a minimum backlash. The first lower planetary gear 57 is also composed of two gears 57a and 57b, so that the first lower planetary gear 57 can mesh with the third drive gear 64 in a state where backlash is minimized. Similarly, the second upper planetary gear 60 is constituted by two gears 60a and 60b, and can mesh with the second drive gear 53 in a state where the backlash is minimized.
The second drive gear 64 is also composed of two gears 61a and 61b so that the third drive gear 64 can be meshed with the third drive gear 64 with a minimum backlash.

The first holder 54 and the second holder 58
As shown in FIG. 7, the holders 54 and 58 are located on the left and right sides of the axis of the drive shaft 30, and the two holders 54 and 58 are adjusted by the adjustment mechanism 65 disposed on the side of the drive shaft 30. Are pivoted in mutually opposite directions about. That is, one end of the first adjustment member 66 is pivotally supported by the first arm 54a of the first holder 54, and one end of the second adjustment member 67 is pivotally supported by the second arm 58a of the second holder 58. As shown in FIG. 6, a guide rail 69 is provided on the main body of the indexing device 63 via an attachment member 68 so as to extend in parallel with the carton conveyance direction. A support member 71 is disposed on the upper surface of the slider 70 crossing the sliding direction. The other end of the first adjustment member 66 is pivotally supported at one end of the support member 71 in the longitudinal direction, and the other end of the second adjustment member 67 is pivotally supported at the other end.

A bracket 72 is provided at an end of the mounting member 68 which is separated from the drive shaft 30.
2, the adjusting screw 73 is provided in a state where it is rotatable and its movement in the axial direction is restricted. The adjustment screw 73 is screwed into the support member 71 as shown in FIG. An adjustment motor 74 is provided on the bracket 72, and a gear 75 provided on the motor 74 and an adjustment screw 7 are provided.
3 is engaged with the gear 76 to rotate the adjusting motor 74 in the forward and reverse directions, so that the adjusting screw 73 rotates in the forward and reverse directions to move the slider 70 forward and backward along the guide rail 69. It is configured as follows. With the movement of the slider 70, the first adjustment member 66 and the second adjustment member 67 move, and as a result, as shown in FIG.
The second holder 58 and the second holder 58 swing about the drive shaft 30 in opposite directions by the same amount. That is, the first lower planetary gear 57 and the second lower planetary gear 61 rotate and move with respect to the third drive gear 64 whose position is fixed, so that the first upper planetary gear 56 and the second upper planetary gear 60 are moved. The first drive gear 52 and the second drive gear 53 meshing with each other rotate the same amount in the opposite directions to each other, and as shown in FIGS. 8 and 9, a pair of the first holding member 40 and the second holding member 44 are formed. And the interval between them is variable.

The first holder 54 and the second holder 5
8, the first holding member 40 and the second holding member 4 swing the same amount in opposite directions about the axis of the drive shaft 30.
4 moves toward and away from each other by the same amount with respect to the center L of the separation distance. Thereby, the carton 18
When the size is changed, the distance between the two holding members 40 and 44 can be adjusted with reference to the width center of the carton 18. The bracket 72 is provided with a pulse counter 77 connected to an adjustment screw 73, and the pulse counter 77 detects the number of rotations of the adjustment screw 73, so that the first holding member 40 and the second holding member 44 It is configured to be able to detect the separation interval of.

[0021]

Next, the operation of the spacing adjusting device according to the embodiment will be described below. In FIG. 8, the first holding member 40 provided on the first endless chain 36 is located on the upstream side in the carton transport direction, and the second holding member 44 provided on the second endless chain 38 is located on the downstream side. It is assumed that
The spacing between the holding members 40 and 44 is set to correspond to the width of the small-sized carton 18. The relationship between the first holder 54 and the second holder 58 in this state is shown by a solid line in FIG. Further, in each of the planetary gears 56, 57, 60, 61, the corresponding gear 56a, 56b / 57a, 57b / 60
The relative positions of a, 60b / 61a, 61b are adjusted, and the meshing state with each of the drive gears 52, 53, 64 is set to minimize the backlash.

As shown in FIG. 1, when the pair of the first holding member 40 and the second holding member 44 reach the supply position of the carton 18, the carton 18 is moved between the two members 40, 44 by means not shown. And the carton 18 is
It is held from both left and right sides by the holding member 40 and the second holding member 44. When the third drive gear 64 is rotated in a required direction by the indexing device 63 in a state where the first holder 54 and the second holder 58 are positioned, the first lower planetary gear 57 and the second lower planetary gear meshing with the gear 64 are rotated. The gear 61 rotates in the same direction. With the rotation of the first lower planetary gear 57, the drive shaft 30 rotates via the first upper planetary gear 56 and the first drive gear 52, and the first drive sprocket 32 rotates. Further, with the rotation of the second lower planetary gear 61, the hollow shaft 28 rotates via the second upper planetary gear 60 and the second drive gear 53, and the second drive sprocket 34 is the same as the first drive sprocket 32 in the same direction. Rotate by an angle. That is, the first endless chain 36 and the second endless chain 38 synchronize with each other and travel downstream by the same amount, and the first holding member 40 and the second holding member 44 holding the carton 18 are separated from each other. It moves downstream while keeping the interval constant, and transports the carton 18 to the next indexing position.

Next, when the width of the carton 18 becomes large due to the size change, the adjusting motor 74 is driven in a required direction to move the slider 70 through the adjusting screw 73 along the guide rail 69 along the driving shaft 30. Move closer to. The first adjustment member 66 and the second adjustment member 77 move forward with the movement of the slider 70, and the first holder 54 and the second holder 58 move relative to each other about the drive shaft 30 as shown by a two-dot chain line in FIG. In the opposite direction by the same amount. As a result, the relative positions of the planetary gears 56, 57, 60, and 61 change with respect to the three drive gears 52, 53, and 64, and the lower planetary gears 57, with respect to the fixed third drive gear 64. As the 61 moves while rotating, the first
The drive shaft 30 and the first drive sprocket 32 rotate via the upper planetary gear 56 and the first drive gear 52, and the hollow shaft 28 and the second drive sprocket via the second upper planetary gear 60 and the second drive gear 53. 34 rotates. In this case, since the first driving sprocket 32 and the second driving sprocket 34 rotate in opposite directions, the first holding member 40 and the second holding member 44 are separated from each other as shown in FIG. Are moved away from each other by the same distance with respect to the center L of. Thereby, the distance between the holding members 40 and 44 is adjusted so as to substantially match the width of the large-sized carton 18.

As described above, since the drive system of the endless chains 36 and 38 is constituted by the gear train, there is little backlash and the holding members 40 and 44 can be accurately indexed and positioned. Further, since each of the planet gears 56, 57, 60, 61 and each of the drive gears 52, 53, 64 are meshed in a state where the backlash is minimized, it is possible to accurately position the holding members 40, 44. And more accurate index positioning can be achieved. Furthermore, since the first holding member 40 and the second holding member 44 move close to and away from each other with reference to the center L of the separation distance, the carton transfer conveyor 10
Can also correspond to a conveyor set on the basis of the center of the distance between the pair of holding members 40 and 44.

In the above-described embodiment, the chain-sprocket structure has been described as an example of the means for transporting the carton. However, the present invention is not limited to this, and may be, for example, a belt-pulley structure. In the belt-pulley configuration, it is recommended to use toothed belts and pulleys. In addition to the drive mechanism including the drive motor 62 and the indexing device 63 as in the embodiment, a drive motor is directly connected to the third drive gear to control the rotation and indexing of the motor. It is also possible. Furthermore, the drive mechanism intermittently (indexes) the endless chain.
The chain is not limited to running, and the chain may be run continuously.

[0026]

As described above, according to the apparatus for adjusting the distance of the carton transfer conveyor according to the present invention, since the drive system of the endless cable is constituted by a gear system with less mechanical backlash, the holding member by the drive mechanism is formed. Positioning can be performed accurately. In addition, since the power transmission from the adjusting mechanism for adjusting the interval between the holding members is also performed by the gear train, the position of the holding member can be adjusted to an accurate position corresponding to the carton size, and the carton is securely held by the holding member. I can do it.
Further, since the pair of holding members are moved toward and away from each other by the same amount, the distance can be adjusted based on the center of the distance between the pair of holding members.

Further, since each planetary gear is constituted by superposing two gears, by changing the phase of the gears, each planetary gear and each drive gear are meshed with each other with a minimum backlash. The positioning of the stop of the carton transfer conveyor and the adjustment of the distance between the holding members can be further improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a carton transfer conveyor in which an interval adjusting device according to the present invention is employed.

FIG. 2 is a longitudinal sectional view showing a main part of the gap adjusting device according to the embodiment.

FIG. 3 is a main part front view showing an arrangement relationship between a first endless chain and a first holding member and a second endless chain and a second holding member according to the embodiment.

FIG. 4 is a front view showing a main part of the gap adjusting device according to the embodiment in a partially longitudinal section.

FIG. 5 is a schematic perspective view showing a main part of the gap adjusting device according to the embodiment.

FIG. 6 is a side view showing a main part of the gap adjusting device according to the embodiment.

FIG. 7 is a plan view showing an adjusting mechanism of the interval adjusting device according to the embodiment.

FIG. 8 is a main part plan view showing a state in which a distance between a first holding member and a second holding member according to the embodiment is reduced.

FIG. 9 is a plan view of an essential part showing a state in which a distance between a first holding member and a second holding member according to the embodiment is increased.

[Explanation of symbols]

 28 hollow shaft 30 drive shaft 32 first drive sprocket (first rotating body) 34 second driving sprocket (second rotating body) 36 first endless chain (first endless cable) 38 second endless chain (second endless cable) Body) 40 First holding member 44 Second holding member 52 First drive gear 53 Second drive gear 54 First holder 55 First support shaft 56 First upper planet gear 57 First lower planet gear 58 Second holder 59 Second Support shaft 60 Second upper planet gear 61 Second lower planet gear 62 Drive motor (drive mechanism) 63 Indexing device (drive mechanism) 64 Third drive gear 65 Adjustment mechanism

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Masahiro Kaizuki 4-380 Nakaodai, Nishi-ku, Nagoya-shi, Aichi Prefecture Fujikikai Nagoya Plant (56) References Really Open 3-125717 (JP, U) Really Open Hei 6-23922 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B65G 17/46 B65G 17/26

Claims (2)

(57) [Claims] 1. A first endless cable body (36) provided with a first holding member (40) and a second endless cable body (38) provided with a second holding member (44) are arranged in parallel. The cartons (18) opened in a cylindrical shape by the first holding member (40) and the second holding member (44) were held from both sides by driving and driving the both cords (36, 38). In the carton transfer conveyor adapted to be transported in a state, the first endless cable body (36) is wound around, and the first rotating body (32) and the first driving gear (52) for driving the same are integrally rotated. A drive shaft (30) disposed so as to be rotatably supported coaxially with the drive shaft (30) so as to be freely rotatable, and the second endless cable (38) is wound therearound. A hollow shaft (28) arranged so that a second rotating body (34) and a second drive gear (53) for driving the shaft integrally rotate; and a first support shaft (30) parallel to the drive shaft (30). 55) is rotatably provided, and the first support shaft (5 5), a pair of planetary gears (56, 57) are arranged so as to rotate integrally, and one planetary gear
(56) is engaged with the first drive gear (52) and the drive shaft (3
0), a first holder (54) arranged to be swingable about its axis and a second support shaft (59) parallel to the drive shaft (30). A pair of planetary gears (60, 61) are disposed on the second support shaft (59) so as to rotate integrally, and one planetary gear
The drive shaft (3) is engaged with the second drive gear (53).
0), a second holder (58) arranged swingably about its axis, a second planetary gear (57) arranged on the first support shaft (55) and a second support (58). A drive mechanism for rotating and driving a third drive gear (64) with which the other planetary gear (61) disposed on the shaft (59) meshes in common.
(62, 63), linked to the first holder (54) and the second holder (58),
An adjusting mechanism (65) for swinging both holders (54, 58) by the same amount in mutually opposite directions about the axis of the drive shaft (30), and in a state where the holders (54, 58) are positioned By rotating the third drive gear (64), the planetary gears (56, 57) of the first holder (54) and the planetary gears (60, 61) of the first drive gear (52) and the second holder (58) are rotated. ) And the second drive gear (53).
By rotating the rotating body (32) and the second rotating body (34) synchronously in the same direction, the first endless end is maintained while the distance between the first holding member (40) and the second holding member (44) is kept constant. Cord (36) and second
The endless cord (38) is caused to travel in the same direction, and the holder (54, 58) is driven by the drive shaft (30) by the adjusting mechanism (65).
By swinging the same amount in the opposite directions about the axis of each planet gear, each planetary gear
By changing the phase of (56, 57, 60, 61), the first holding member (4
0) and the second holding member (44) are configured to move the first endless cord (36) and the second endless cord (38) in mutually opposite directions so as to move toward and away from each other. Characteristic carton transfer conveyor spacing adjustment device. 2. The planetary gears (56, 57, 60, 61) are superposed such that the phases of two gears (56a, 56b / 57a, 57b / 60a, 60b / 61a, 61b) can be changed. And two gears (56a, 56b / 5
7a, 57b / 60a, 60b / 61a, 61b) by changing the phase to engage the corresponding drive gear (52, 53, 64) in a state where the backlash is minimized, so that each holding member (40, The distance adjusting device for a carton transfer conveyor according to claim 1, wherein the positioning of (44) can be accurately performed.